living organisms see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Superkingdom Eukaryotae see Domain Eukaryota Chatton, 1925
     Kingdom Animalia Linnaeus, 1758 - animals
       Subkingdom Eumetazoa Butschli, 1910 see [unranked] Eumetazoa Bütschli, 1910
         Phylum Arthropoda Siebold, 1848 - arthropods
           Subphylum Crustacea Brünnich, 1772 - crustaceans see Superclass Crustacea Pennant, 1777
             1 Family Ctenosculidae Thiele, 1925
             2 Subclass Cephalocarida H.L. Sanders, 1955 see Class Cephalocarida H.L. Sanders, 1955
             3 Subclass Branchiopoda Latreille, 1817 see Class Branchiopoda Latreille, 1817
             4 Subclass Ostracoda Latreille, 1806 - ostracods see Class Ostracoda Latreille, 1802
             4 Class Ostracoda Latreille, 1802 - ostracods
             5 Subclass Mystacocarida Pennak & Zinn, 1943 - mystacocarids
             6 Subclass Copepoda H. Milne-Edwards, 1840 - copepods
             7 Subclass Branchiura Thorell, 1864 - fish lice
             8 Subclass Cirripedia Lamarck - barnacles and their kin see Infraclass Cirripedia Burmeister, 1834
             9 Subclass Malacostraca Latreille, 1802 see Class Malacostraca Latreille, 1802